36 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



posterior and anal areas into tiny rounded or truncated conical pro- 

 jections. In the costal area also they are replaced by minute rounded 

 tubercles. Along the posterior margin of the wing these setulae are 

 frequently twice as long as on the surface, but they are still minute 

 and are merely processes, not setae. 



The wing is articulated to the metanotum by means of the two notal 

 wing processes (figs. 4 F, 6 A, anp, pup) and the three axillary scle- 

 rites {ax. i, ax. 2, ax. j). Figure 6 A shows the relations of these 

 parts to the wing. The united subcosta and radius {Sc + R) is the only 

 vein that is prominent at the wing base, and it forms a definite articula- 

 tion with the first axillary sclerite {ax. i). Near the base of the first 

 and second axillaries is a process of the scutum which evidently forms 

 a condyle for the base of the second and middle portion of the third 

 axillaries. This is tentatively designated the scutal wing process 

 (swp) as it has apparently been unnoticed heretofore. 



The legs are composed of five main divisions, the coxae, trochanters, 

 femora, tibiae, and tarsi. The first four divisions consist of a single 

 segment each, the tarsus consisting of five subsegments or tarsomeres, 

 the last of which bears the pretarsus and its ungues. 



The anterior legs (fig. 8F) are short and stout and very densely 

 covered with setae. The coxa (ex) is rather cylindrical and fusiform. 

 Its proximal end articulates with a proximal process of the trochantin 

 by means of a condyle (fig. 8 H, cxa) and with the distal end of the 

 trochantin by a somewhat indefinite projection (tra). The distal end 

 of the coxa bears the articulation of the trochanter (fig. 8 F, fr) 

 upon its ventral side. This articulation (fig. 8 G) is a large mem- 

 branous area with several rather indefinite projections which sei-ve as 

 condyles. The dorsal and anterior surfaces of the coxa are densely 

 set with slender setae, even more densely than shown in figure 8 F, 

 but the ventral and posterior surfaces are glabrous and impunctate, 

 with the following exception. Along the posterior edge of the ventral 

 face, from the middle to the distal end, is a row of long and slender 

 setae. The punctures are small and placed in a regular series at first, 

 but distally are crowded and somewhat irregular. Some of the setae 

 attain a length equal to half the width of the coxa. The dorsal vesti- 

 ture is also denser near the distal end of the coxa. 



The trochanter of the prothoracic leg (fig. 8 F, G, tr) is rather 

 elongate and somewhat triangular. It is immovably attached to the 

 base of the femur, thus forming the articulation of the latter with 



